Improvement in stove-pipe-elbow machines



F. A. GLEA'SON.

sTovE-PIPE ELBOW-MACHINE.

Patented Jan.`9,1877.

Imm.- a?

UNITED STATES PATENT @Fritesc IMPROVEMENT IN STOVE-PIPE-ELBOW MACHINES.

Specification forming part of Letters Patent No. 186,004, dated January9, 1877; application filed April 17, 1876.

To all whom t may concern.-

Be it known that I, FRANKLIN A. GLEA- SON, of the city of Brooklyn,county of Kings, and State of New York, have invented a Machine for theManufacture ot' Sheet-Metal Elbows and an Improved Elbow, manufacturedby the same, of which the following is a specication:

rI he object of my invention is to facilitate the manufacture of, andalso produce a superior joint, in sheetmetal elbows for hotair pipes,stove-pipes, leaders, 85o., by placing the edges of the sections onewithin another, and, by special machinery, pressing a bead, combinedwith a llange, into the overlapping parts. To do this I construct theform or mold A A, beading-dies B, O, O, and Dfand their operating-leversF Gr, as shown in the perspective view, Figure 1, of the accompanyingdrawing.

The interior of the form A A, when shut, corresponds in size and numberof sections with the elbow required, which may be more or less than theone represented. In each angle is a groove around the entirecircumference, l 2 3, &c., which constitutes a mold, into which the beadis pressed. These grooves are all radiations from the center-bolt f,upon which it turns, and by which it is mounted upon the upright H. Thebeadingdies are divided into several parts. llhe top one, B, isstationary, being xed to the upright J. Two others, G G, are held inposition by bolts at the top, the lower ends being free to movelaterally, and are also jointed for the purpose of folding into acompass sufficiently small to allow the pipe to pass over them. The dieD completes the circle, with the exception of` the seam, where a smallportion of its bead is cut away, so that the seam is left straight. Thebottom of this die is held in position by the guidebar a, (see sectionalelevation, Fig. 2,) and the top is connected with the lever K, which, atthe bottom, is connected with the arm of the rock-shaft L, and operatedby the handlever F. On either side of this lever, and within the uprightJ, are two levers, N, (one only is represented, the other being itsduplicate,) connected at the bottom with the hand-lever Gr, the topsbeing bent forward and terminating in wedge form e e, Fig. 1, which passout between the die D and dies O C. On either side of the bead the diesare tted to the varying angle of the form c c, Fig. 2, so that theoverlapping metal extending beyond the bead is laid flat and close. (Seen n n, sectional view of elbow, Fig. 4..)

As will be evident, the joint can be separated only by tearing orstraining open the outer section, and to this the ange so made furnishesgreat power of resistance, thereby increasing the strength andconsequent durability of the elbow.

In operation, the hand-lever G is thrown 'back to the dotted lines, Fig.l, which moves the wedges e e upward by the connectinglinks, liftingalso the lower ends of the dies O O, and, coming in contact with theprojections above, cause the bottom to swing inward. The hand-lever F isthen moved backward to the dotted lines, bringing the die D to theposition shown, Fig. 3, folding the lower ends of dies C G within theopening near the bottom. The sections of the elbow, being placed onewithin another, are laid into the form A, which, being closed upon them,is moved over the dies to the first angle, Fig. 2. Hand-lever F is thenbrought forward, moving the top of die D past the lixed cam d, whichforces it downward, carryngthe form downward sufficiently to bead theupper portion simultaneously with the lower portion. Remaining there, itholds the seam of the pipe, as in a vise, thereby preventing its beingtorn open by the strain consequent upon beading the sides. The handleverGr is now brought forward, which moves the wedges e e downward, forcingthe dies outward, completing that operation. The levers Gr and F arethen moved back again, the form passed over to the next angle, theoperation being repeated at each angle consecutively.

Elbows with beaded joints have been before constructed, but the sectionsare beaded separately and put together afterward, leaving the joint moreor less loose, and, in no case within my knowledge, having the beadstrengthened by a dange.

I claim as my invention- 1. The form or mold A A, of two portions,

hinged together, each portion having sections and angles adapted to thework required, and having a groove, 1 2 3, &c., in each angle, the moldbeing mounted on a rotating axis at a right angle to its longitudinalaxis, in combination with beading-dies B C C D, substantially as and forthe purpose described.

2. The beading-dies B, G, C, and D, adapted to contract and 'expand in,circumference, guide-bar a, and wedges e e, with the connections andlevers, all constructed and operating u substantially as shown anddescribed.

Witnesses i J oHN H. SwARTz, CEAS. D. J UOHAU.

FRANKLIN A. GLEAsON.

